Throttle-lever



N0. 6|U,U27. Patented Aug. 30, I898. L. W. CANADY. THROTTLE LEVER.(Application fila Dec. 15, 1897.)

(No Model.)

/N VENTOI? W/TNESSES MW A TTOHNE Y S,

llwr'rnn Sra'rns Parent @rrrcnl LORIN WINFIELD CANADY, OF TOYAH, TEXAS.

TH ROTTLE-LEVER.

SPECIFICATION forming part of Letters Patent No. 610,027, dated August30, 1898. Application filed D c m 15, 1897. Serial No. 661,999. (Nomodel.)

. the throttle of the locomotive or other engine may be thrown to an yposition and held firmly and surely at such position by the automaticoperation of its parts, at the same time permitting the throttle to beeasily readjusted by an action of the engine-driver.

This specification is the disclosure of one form of my invention, whilethe claims define the actual scope of the invention.

Reference is to be had to theaccompanyin g drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure 1 is a front elevation of the invention, with a part in section,on the line I I of Fig. 2; and Fig. 2 is a plan view, with parts insection, on the line II II of Fig. 1.

The drawings show a locomotive-throttle, and here the throttle-lever ais, as usual, fulcrumed on an arm 19 standing out from the boiler c. Thethrottle-stem cl is'pivoted to the lever and slides in a gland e rigidwith the boiler. The gland e carries rigidly two lugs f, holding betweenthem a pin g, which is received by the slightly-elongated orifice h inan arc-shaped arm a, whereby to mount said arm to swing between the lugsf and on the pin g, the slight elongation of the slot h permitting thearm to have that lateral move ment which is essential to evenness ofoperation in connection with the throttle-lever Ct. The throttle-leveris provided with a. slot 7t, through which the arm 11 loosely extends.Mounted to swing in the slot 70 and on a pin Z is a cam m, which worksagainst the arm 4 and which is provided with an extension at, projectingtoward the free end of the lever a and in approximate parallelism withthe lever. Connected to the end of the extension n is a rod 0, whichextends through the contracted outer portion of the slot 70 and isconnected with a handpiece 1?, pivoted on the outer end of the lever a.An expansive spiral spring (1 embraces the rod 0 and bears against theextension 02 and against the adjacent side of the throttle-lever a.WVith such an arrangement the spring q normally throws the extension 91in the position shown in Fig. 2, causing the cam m tobind firmly againstthe arm 23, and by these means the throttle-lever a is held fixedly atthe proper adjustment. This adjustment may readily be changed bythrowing the handpiece 19, so as to draw the extension 77. inwardagainst the tension of the spring q, thus releasing the cam m from itsengagement with the arm '5 and permitting the lever a to be adjusted.Immediately upon the relaxation of the pressure upon the handpiece p thespring q expands and forces the cam m against the arm '5, and thus locksthe leverin place.

The arm 2' is provided with a slot 2', which may receive a bolt and nutor other clamping device whereby to limit the movement of the lever Ctor to lock the lever immovably on the arm.

The invention, while particularly adapted for throttle-levers, iscapable of usein many other connections, among which is thereversing-lever of locomotive-engines.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a throttle, the combination with the boiler,having a rigid arm and a gland, a lever fulcrumed on said rigid arm, anarm mounted to swing on the gland and having sliding ongagement with thelever, and a spring-pressed cam carried on the lever and capable of engaing the arm.

2. The combination with a boiler having a rigid arm projecting outwardtherefrom, and also having a packingland thereon, of a lever fulcrumedto the arm, a movable arm having an elongated orifice receiving aportion of the packing-gland whereby to pivotally mount the arm, thelever having a slot therein through which slot the arm extends, a cammounted in the slot and capable of engaging the arm 'to lock. the armand lever with each other, a spring pressing the cam,

and a handpiece mounted on the lever and spring pressing the cam and ahandpiece in connection with the cam to move the lover mounted on thelever and connected with the against the tension of the spring. cam tomove the same against the spring. 3. The combination of a lever, an armLORIN XVINFIELD OAN'ADY.

mounted to swing adjacent to the lever, a cam Witnesses:

mounted to rock on the lever and engaging L. O. JUDSON,

the arm to lock the same with the lever a HARRY B. OHARMAN.

